This isn't really true anymore, USB-C PD (which is technically just USB PD but there's no standard for using it on anything but USB-C) is displacing QC for most applications. It is however something where most chargers and devices will likely try to support it for the forseeable future, though, in the name of compatibility (nowadays you can get chips from TI and the like which will basically try all the standards that they can, to find the fastest charging rate). Also, AFAIK there's no licensing fee required to be compatible with QC.
